TCSETPGRP(3)              OpenBSD Programmer's Manual             TCSETPGRP(3)

NAME
     tcsetpgrp - set foreground process group ID



SYNOPSIS
     #include <sys/types.h>
     #include <unistd.h>

     int
     tcsetpgrp(int fd, pid_t pgrp_id);

DESCRIPTION
     If the process has a controlling terminal, the tcsetpgrp() function sets
     the foreground process group ID associated with the terminal device to
     pgrp_id. The terminal device associated with fd must be the controlling
     terminal of the calling process and the controlling terminal must be cur-
     rently associated with the session of the calling process.  The value of
     pgrp_id must be the same as the process group ID of a process in the same
     session as the calling process.

     Upon successful completion, tcsetpgrp() returns a value of zero.

ERRORS
     If an error occurs, tcgetpgrp() returns -1 and the global variable errno
     is set to indicate the error, as follows:

     [EBADF]       The fd argument is not a valid file descriptor.

     [EINVAL]      An invalid value of pgrp_id was specified.

     [ENOTTY]      The calling process does not have a controlling terminal,
                   or the file represented by fd is not the controlling termi-
                   nal, or the controlling terminal is no longer associated
                   with the session of the calling process.

     [EPERM]       The pgrp_id argument does not match the process group ID of
                   a process in the same session as the calling process.

SEE ALSO
     setpgid(2),  setsid(2),  tcgetpgrp(3)

STANDARDS
     The tcsetpgrp() function is expected to be compliant with the IEEE
     Std1003.1-1988 (``POSIX'') specification.

OpenBSD 2.6                     March 29, 1992                               1